[FONT=VERDANA,ARIAL,HELVETICA][SIZE=-2] Notes: One of the largest-ever flesh-eating land animals, Tyrannosaurus is also the most famous. For example, it has been featured in more movies than any other single dinosaur. Tyrannosaurus had a huge skull with powerful jaws lined with 7-inch (18-cm) serrated teeth. Contrary to earlier conceptions of sluggish mobility, Tyrannosaurus is now thought by some to have been capable of bursts of up to 30 mph (48 km/h). In contrast to its massive legs, Tyrannosaurus had relatively short, small arms. Although they seem vestigal and useless, they were powerful enough to lift over 450 pounds (270 kg). Tyrannosaurus was found in North America and Asia. The most famous species is Tyrannosaurus rex from North America; Tyrannosaurus bataar from Asia was formerly known as Tarbosaurus.[/SIZE][/FONT]

[FONT=VERDANA,ARIAL,HELVETICA][SIZE=-2] Notes: Discovered in Colorado by dinosaur digger Jim Jensen of Brigham Young University, this extremely large dinosaur was formerly known as Ultrasaurus. The name was changed as it had previously been claimed for a South Korean specimen. Ultrasauros had an unusually small head that towered on a giraffe-like neck, a short tail for its size, and pillar-like legs. In fact, Ultrasauros may have been a very large Brachiosaurus.[/SIZE][/FONT]

[FONT=VERDANA,ARIAL,HELVETICA][SIZE=-2] Notes: Found in eastern Utah, this dinosaur was armed with a 15-inch (35-cm) claw on one toe of each hind foot, claws on each finger of its hands, and razor-sharp teeth. Believed to be an agile, very fast predator, Utahraptor probably attacked prey many times larger than itself, striking numerous fatal blows with its sharp hind claws. It is also believed to have hunted in packs, thus indicating behavior of a relatively intelligent and warm-blooded animal. Utahraptor combines the behavior of Velociraptor and Deinonychus with much greater size.[/SIZE][/FONT]

[FONT=VERDANA,ARIAL,HELVETICA][SIZE=-2] Notes: Closely related to and resembling Dryosaurus, Valdosaurus was probably a descendent of that dinosaur. Its remains have been found in England and Niger.[/SIZE][/FONT]

[FONT=VERDANA,ARIAL,HELVETICA][SIZE=-2] Notes: Found in Mongolia, China and Russia, Velociraptor was a ferocious predator with the second toe of each foot bearing a formidably large, retractable claw. Velociraptor was similar in appearance to the larger Deinonychus and the much larger Utahraptor. Like Deinonychus and possibly Utahraptor, it may have hunted in packs -- although Velociraptor and Utahraptor fossils have never been found in groups like Deinonychus. Velociraptor was not as fast as a cheetah, nor as smart as a chimpanzee, as suggested in the movie Jurassic Park.[/SIZE][/FONT]

[FONT=VERDANA,ARIAL,HELVETICA][SIZE=-2] Notes: Found in Egypt, Spinosaurus may have been the largest of theropods, larger even than Tyrannosaurus. This evaluation is based on the fact that the vertebrae of Spinosaurus were 20% larger than those of Tyrannosaurus. Spinosaurus certainly would have appeared larger, due to the sail-like fold of skin that 6-foot spines supported. This sail was probably used for thermal regulation, possibly evidence that not all dinosaurs were warm-blooded.[/SIZE][/FONT]

[FONT=VERDANA,ARIAL,HELVETICA][SIZE=-2] Notes: Found in southern Mongolia, Gallimimus is the largest ornithomimid to be discovered, and the only one for which a good skull has been recovered. The skull reveals that Gallimimus' snout was like that of a modern-day goose -- flattened at the end. Its neck was long and mobile, suggesting the ostrich, which it resembles. Its hands were thin and probably too weak for strong grasping.[/SIZE][/FONT]

[FONT=VERDANA,ARIAL,HELVETICA][SIZE=-2] Notes: Dilophosaurus takes its name from the delicate double crest on its head. This odd-appearing crest may have served as a secondary sexual characteristic, differentiating males from females. The fact that the jaws of Dilophosaurus are not as strong as other theropods of its size suggests that it may have dined on carrion. Dilophosaurus footprints found in trackways indicate that it traveled in groups.[/SIZE][/FONT]

[FONT=VERDANA,ARIAL,HELVETICA][SIZE=-2] Notes: Discovered in Alberta, Canada, Daspletosaurus was a contemporary of Albertosaurus. A marginally smaller, close relative of Tyrannosaurus, Daspletosaurus' possessed the typical tyrannosaurid two-fingered hands, but its powerful jaws were equipped with larger (although fewer) teeth than Tyrannosaurus. It is conjectured that the heavily-built Daspletosaurus preyed upon ceratopsians.[/SIZE][/FONT]

[FONT=VERDANA,ARIAL,HELVETICA][SIZE=-2] Notes: The fragmentary remains of many carnosaurs have been assigned to Megalosaurus, making it something of a grab-bag classification. The first dinosaur bone on record to be discovered in 1677 in England. The remains of Megalosaurus and Iguanodon were the first to be recognized by 19th century scientists as dinosaurs. The two were portrayed in illustrations and in concrete, life-size statues as scaled-up lizards. The statues, first of their kind, still stand in London, England. The fragmentary remains of many dinosaurs have been assigned to Megalosaurus.[/SIZE][/FONT]

[FONT=VERDANA,ARIAL,HELVETICA][SIZE=-2] Notes: Found in southern England, Metriacanthosaurus had vertebrae with spines up to 10 inches (25.4 cm) long, perhaps supporting a skin sail. It has been speculated that the purpose of such skin sails was to aid in regulating body temperature.[/SIZE][/FONT]

[FONT=VERDANA,ARIAL,HELVETICA][SIZE=-2] Notes: The discovery of this dinosaur in Montana in 1964 drastically altered the traditional view of dinosaurs as sluggish, slow-moving reptiles. Deinonychus was obviously built for speedy pursuit of its prey. Among other things, it had special interlocking vertebrae that allowed its tail to stiffen for balance while running. Excellent eyesight, sharp, serrated teeth that curve backwards for slicing, and the namesake 5-inch (13 cm) long, knife-like claws on each foot make Deinonychus a fearsome hunter. Five specimens were found together, leading to the theory that Deinonychus hunted in packs.[/SIZE][/FONT]